20528638733 has 2 divisors, whose sum is σ = 20528638734. Its totient is φ = 20528638732.

The previous prime is 20528638727. The next prime is 20528638769. The reversal of 20528638733 is 33783682502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16714094089 + 3814544644 = 129283^2 + 61762^2 .

It is a cyclic number.

It is not a de Polignac number, because 20528638733 - 2¹⁴ = 20528622349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20528638723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10264319366 + 10264319367.

It is an arithmetic number, because the mean of its divisors is an integer number (10264319367).

Almost surely, 2^20528638733 is an apocalyptic number.

It is an amenable number.

20528638733 is a deficient number, since it is larger than the sum of its proper divisors (1).

20528638733 is an equidigital number, since it uses as much as digits as its factorization.

20528638733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 20528638733 in words is "twenty billion, five hundred twenty-eight million, six hundred thirty-eight thousand, seven hundred thirty-three".